1. Personalization: Use the recipient's name and tailor the content to their specific interests. 2. Timing: Send emails at a time when the recipient is most likely to engage. 3. Value: Ensure the message provides real value, whether it's in the form of useful information, discounts, or exclusive offers. 4. Clear Call-to-Action: Include a clear and compelling call-to-action that aligns with the recipient's needs.